adds a config parameter to enable ffmpeg (defaults to false); checks this config parameter in the transcode video job, aborting if false; checks this config parameter in the transcode video job spec, does not run spec if false
Merge pull request #22 from psu-stewardship/master

adds a config parameter to enable ffmpeg (defaults to false); checks this config parameter in the transcode video job, aborting if false; checks this config parameter in the transcode video job spec, does not run spec if false